Our holographic qubit threads model can visualize the connection between the entanglement of the boundary quantum system and the connectivity of the holographic bulk spacetime. Consider a thought experiment similar to Raamsdonk's famous “It from qubit" experiment [1]}, see figure REF . Consider dividing the whole boundary quantum system \(M\)  into two halves, denoted as \({M_ + }\)  and \({M_ - }\) , then remove the entanglement between the two halves, but still preserve the entanglement between the internal elementary regions within \({M_ + }\)  and those within \({M_ - }\) . Then this implies that the values of bit thread fluxes characterizing the former vanish, while those characterizing the latter are unchanged. Since these vanishing bit threads are originally passing through a series of RT surfaces and thus contributing to all these RT surfaces, not only does the area of the RT surface separating \({M_ + }\)  and \({M_ - }\)  shrink to zero (and thus the original bulk spacetime \(N\)  is split into two new disconnected independent spacetimes), but the areas of the RT surfaces inside the two halves of \(N\)  also decreases. Although we still do not fully figure out how to decode the geometric information of any surface or any region in the bulk from the entanglement information in the boundary CFT states completely, however, the area changes of these RT surfaces can quantitatively characterize how the bulk spacetime shrinks and splits as the quantum entanglement is taken away to some extent. This quantitative calculation can in principle be explicitly implemented by the following formula in the locking bit thread configuration [2]}:
\(\begin{array}{l}{\rm {Are}}{{\rm {a}}_{a\left( {a + 1} \right) \ldots b}} = 4{G_N}\sum \limits _{s,t} {{F_{st}}} ,\\s \in \left\lbrace  {a,a + 1, \cdots ,b} \right\rbrace ,t \notin \left\lbrace  {a,a + 1, \cdots ,b} \right\rbrace \end{array},\) 
